Select the Broan-NuTone 639 Wall Cap to provide reliable wall ventilation. Features a black enamel finish and is designed for use with 3-1/4" x 10" duct. Includes a built-in back-draft damper, and protective bird screen to prevent small pests from entering duct.
Equipped with a spring-loaded backdraft damper and bird screen to keep nests and small animals on the outside
Wall cap is made of 24 gauge CRCQ steel construction with a black electrically-bonded epoxy finish for durability and long life